If you'd like to explore a scenario where Fiona has a comically exaggerated reaction to one of Shrek's infamous ogre farts, it could go something like this:
Shrek and Fiona are having a quiet, romantic evening in their swamp home, with a candlelit dinner.
Shrek, being his usual unrefined self, can't hold back a particularly loud and unexpected fart. He might blush or grin sheepishly.
Fiona, taken aback by the sudden noise, gasps and covers her nose. "Oh, Shrek!" she exclaims, waving her hand in front of her face.
Fiona might playfully pretend to faint, collapsing onto the table, and Shrek, worried and chuckling, tries to revive her.
Eventually, Fiona "wakes up" with a laugh, and they both share a hearty giggle about Shrek's unapologetically ogre-like manners.
